Half-reaction E0 (V) Cr3+(aq) + 3e- → Cr(s) -0.74 Fe2+(aq) + 2e- → Fe(s) -0.440 Fe3+(aq) + e- → Fe2+(aq) +0.771 Sn4+(aq) + 2e- → Sn2+(aq) +0.154 Determine the standard cell potential (E0cell) for the voltaic cell for this reaction below based on the table above. 2Cr(s) + 3Fe3+(aq) → 3Fe(s) + 2Cr3+(aq)

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Half-reaction

E0 (V)

Cr3+(aq) + 3e→ Cr(s)

-0.74

Fe2+(aq) + 2e→ Fe(s)

-0.440

Fe3+(aq) + e→ Fe2+(aq)

+0.771

Sn4+(aq) + 2e→ Sn2+(aq)

+0.154

Determine the standard cell potential (E0cell) for the voltaic cell for this reaction below based on the table above.

2Cr(s) + 3Fe3+(aq) → 3Fe(s) + 2Cr3+(aq)

 

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